#include <stdio.h>
#define BYTEWIDTH 8
int b[20];
void SET_LIST_BIT(int c)
{
  (b[((unsigned char) (c)) / BYTEWIDTH] |= 1 << (((unsigned char) c) % BYTEWIDTH));
}


int main(int argc,char **argv)
{

  int i;
  for (i = 0;i < 20;i++) {
    b[i] = 0;
  }

  int c = 49;
  for (i = c;i<54;i++) {
    SET_LIST_BIT(i);
    
  }
  
  return 0;
}
